Mark w



(Nd Model.)

M. W. DEWEY. CONVERTER SYSTEMPOR ELECTRIC RAILWAYS.

Patented Dec. 15, 1891.

WITN ESSES: Fig. 11. INVENTOR,

:8'%% w 3- i f w J 4 ATTORNEYS.

UNITED STATES PATENT OFFICE.

MARK V. DEWEY, OF SYRACUSE, NETV YORK, ASSIGNOR TO THE DEWEY CORPORATION, OF SAME PLACE.

CONVERTER SYSTEM FOR ELECTRIC RAILWAYS.

SPECIFICATION forming part of Letters Patent No. 465,359, dated December 15, 1891.

Application filed May 11, 1891- Serial No. 392,263- (No model.

To all whom it may concern.-

Be it known that I, h/IARK WV. DEWEY, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Electric Railways, (Case No. 91,) of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to electric induction railways the same or similar to that shown and described in a prior application of mine, Serial No. 315,457, filed June 25, 1889; and the object is to provide cores for the primary or road-bed coils that will form and maintain closed magnetic circuits.

By employing normally-closed magnetic circuits of proper conductivity for the pri-.

mary coils there is less waste of energy, as the counter electro-motive force generated thereby in the said coils render them virtually non-conductors, and therefore prevent, to a great extent, the alternating current shortcircuiting through them. These cores are constructed so'that the secondary coil on the vehicle and its core also, if one is used,-may be placed in proper inductional relation to them successively, as set forth in my system above referred to. When the secondary coil is brought in inductional relation to one or more of the primary cores and the circuit containing the secondary coil is closed, the counter electro-motive force is decreased or neutralized to a great extent, proportionally to the amount of Work being done, and current is generated in the secondary circuit, as required.

To this end my invention consists in the combination, in an electric railway, of a source of irregular or alternating currents, conductors extending therefrom, a series of coils placed at intervals along said railway and connected in parallel with said conductors,

normally-closed magnetic circuits forthe coils, a vehicle, a conductor upon the vehicle to be placed in inductional relation to the magnetic circuits successively, and an electric motor to move the vehicle in circuit with the latter conductor.

My invention consists, further, in the combination of a source of irregular or alternating currents, conductors extending therefrom,

a series of coils placed atintervals along said railway and connected in parallel with said conductors, normally-closed magnetic circuits for the coils, a vehicle, circuit on the vehiole, a coil in the circuit, a magnetizable core in the coil, suitable devices to permit the said core to be placed in the magnetic circuits successively, and an electric motor in the circuit to move the vehicle.

My invention consists, still further, in an 7 electric railway, of a source of irregular or alternating currents, conductors extending therefrom along the railway, a series of coils placed at intervals along said railway and connected in parallel with said conductors, a slotted conduit along the railway, slotted iron cores for the coils, iron brushes to maintain normally-closed magnetic circuits, a vehicle, a circuit carried by the vehicle and in the conduit to enter-the slotted cores successively, and an electric motor in the circuit to move the vehicle.

My invention consists, also, in certain other combinations of parts hereinafter described, and specifically set forth in the claims.

In the drawings, Figure l is a side eleva-' tion, partly in section, of an electric railway and a motor-car embodying my invention.

Fig. 2 isa cross-section of the railway, showing a core when in its normal condition or when the vehicle-circuit is not in inductional relation. Fig. 8 is also a cross-section of the railway, but with the vehicle-coil in inductional relation to the core. Fig. at is a plan view of a vehicle-coil. Fig. 5 is a cross-section of Fig. 4 on line yy. Fig. 6 is aside ele vation of another form of vehicle-coil and core. Fig. 7 is a sectional view on line a: a: of Fig. 6. Fig. 8 is a cross-section on line y y of Fig. 6. Fig. 9 shows a cross-section of a coreless vehicle-coil and a modified construction to maintain a normally-closed magnetic circuit. Fig. 9 is a plan view of the ends of a stationary core having iron bars pivoted thereto. Fig. 10 is a plan view of a sectional vehicle-coil. Fig. 11 is a side elevation of the same. Fig. 12 is a form of hanger for the vehicle-coil, and Fig. 13 shows a form of coupling for the sections.

Referring specifically to the drawings, A in the figures represents the vehicle or car,

A the source of irregular or alternatingcurrents, and B the supply or line conductors connected to the source and extending along the railway or track 0.

6 Z) Z) are rectangular iron cores or closed magnetic circuits placed at intervals along the railway, preferably equal distances apart and at right angles to the rails. Said cores are preferably placed within or partially Within a slotted conduit. C, running parallel with the railway and between the rails thereof.

I do not limit myself to any particular distance between two of said cores; but they may be placed apart about the length of a car with good results. A yielding passage is provided through the upper side of each of said cores to allow the secondary coil or coils f, suspended from the car A, to enter, in order that said coil or coils f may be in proper inductional relation to the primary cores during the movement of the car. The said yielding passage is preferably made by fixing iron brushes 6 e to the ends of the solid portion of the core I), so that they will extend toward and be in contact with each other when in their normal condition or when a vehicle-core is not between them. I) b b are coils wound upon the said cores. These coils are connected in parallel with the line conductors.

cl is the vehicle-conductor or the secondary circuit upon the car.

D is the'electric motor in the vehicle-conductor, and c 0 indicate currentregulators. The motor is shown connected to the drivingaxle h by a belt or chain g; but said motor may be of course connected to the drivingaxle by any suitable gearing or means.

In the vehicle-circuit is an elongated coilf about the length of the vehicle and suspended in a horizontal position in the conduit from the truck-frame Ct of the vehicle. The coil is made long, so that the primary coils may be placed farther apart, and to allow the car to be moved a considerable distance while its coil is in inductional relation to a single primary coil. The vehicle-coil is made narrow, so that the conduit may be small, and in order that the yielding paths through the cores may be narrow and the brushes short. The coil is provided with pointed ends to obviate resistance when entering between the brushes. A vehicle-core f may or may notbe provided for the coilf.

In Figs. 4 and 5-t-he core is shown as long as the width of the coil; but in Figs. 6, 7, and 8 it is very thin or I-shaped, to further decrease resistance to its movement, except at its ends, wherethe coilnecessarily occupies more space.

In Fig. 9 a vehicle-coil is shown without a core to still further decrease resistance and to obtain a very light construction or to allow a larger coil to be used. In the same figure I show iron bars 6' e pivoted to the ends of the core I) in the place of the brushes. These bars will be attracted toward each other by v the magnetism therein and will keep the circuit closed; but suitable springs s 8 may be used to assist their movemcn t, if desired, as in-. dicated in Fig. 9.

In railways having curves and primary cores distributed widely apart I divide the vehiclecoil into sections or several small coils, as desired, and place flexible couplings or connections between the sections, so that the coil may conform to the curve and readily enter the yielding paths through the primary cores.

In Figs. 10 and 11, springs 11 are shown between the sections to allow the required flexibility; but in Fig. 13 said sections are connected togetherbya slotted pivoted joint. As it is necessarywhen employing a sectional coil to make provision for the movements of the hangers a supporting the coil, I provide a jointed hanger the same or similar to that shown in Fig. 12. Each section of coil is suspended from the truckframe d by a hanger extending downward therefrom to the center of the section. Said hanger is jointed at its upper end in any well-known manner, so that it will remain perpendicular, but be capable of movement from side to side and upon a vertical axis.

I do not limit myself to the precise details of construction shown and described herein, as they may be modified in various ways without departing from my invention.

Having shown and described herein subject-matters not claimed, I wish it to be understood that any such matters are not dedicated to the public, but form the subject-matter of claims of pending applications, Serial Nos. 296,119 and 313,457, of 1889, and No. 369,002, of 1890.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom, a series of coils placed at intervals along said railway and connected in parallel with said conductors,normally-closed magnetic circuits for the coils, a vehicle, a conductor upon the vehicle to be placed ininductional relation to the magnetic circuits successively, said conductor being entirely movable, and an electric motor to move the vehicle in circuit with the latter conductor.

2. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom, a stationary coil connected in circuit with said conductors, a normally-closed magnetic circuit for said coil, a vehicle, a circuit carried entirely upon the vehicle, suitable devices whereby the latter circuit may be moved in inductive relation to the said magnetic circuit, and an electric motor in the cir cuit on the vehicle to move the same.

3. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom, a series of coils placed atintervals along said railway and connected in parallel with said conductors, normally-closed magnetic circuit for the coils, a vehicle, a circuit on the vehicle, a coil in the circuit, suitable devices to allow the coil to move into and out of inductive relation with the said magnetic circuits successively, and an electric motor in'the circuit to move the vehicle.

4. In an electric railway, a source of irregular or alternating currents, conductors eXtendin g therefrom, a series of coils placed at intervals along said railway and connected in parallel with said conductors, normally-closed magnetic circuit for the coils, a vehicle, a circuit on the vehicle, a coil in the circuit, a magnetizable core in the coil, suitable devices to permit the said core to be placed in the magnetic circuits successively, and an electric motor in the circuit to move the vehicle.

5. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom along the railway, a series of coils placed at intervals along said railway and connected in parallel with said conduct- .ors, a slotted conduit along the railway, normally-closed magnetic circuits for the coils within the conduit, aovehicle, a circuit on the vehicle, a coil in the circuit, suitable devices to allow the coil to move into and out of inductive relation with the said magnetic circuits successively, and an electric motor in the circuit to move the vehicle. 1

6. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom, a series of coils placed at in tervals along said railway and connected in parallel with said conductors, normally-closed magnetic circuits for the coils, a flexible or yielding path through each magnetic circuit,

a vehicle, a conductor on the vehicle and in said path, and an electric motor to move the vehicle in circuit with the latter conductor.

7. In an electric railway, a source of irregular or alternatin g currents, conductors extending therefrom along the railway, a series of coils placed at intervals along said railway and connected in parallel with said conductors, a slotted conduit along the railway, normally-closed magnetic circuits for the coils within the conduit, a flexible or yielding path through each magnetic circuit in the conduit, a vehicle, a circuit carried by the vehicle and in said path, and an electric motor in the circuit to move the vehicle.

8. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom, a series of coils placed at intervals along said railway and connected in parallel with said conductors, slotted iron' cores for the coils, iron brushes to maintain normally-closed magnetic circuits, a vehicle,

a circuit carried by the vehicle to enter the slotted cores successively, and an electric mofor in the circuit to move the vehicle.

9. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom along the railway, aseries of coils placed at intervals along said railway and connected in parallel with said conductors, a slotted conduit along the railway, slotted iron cores for the coils, iron brushes to maintain normally-closed magnetic circuits, a vehicle, a circuit carried by the vehicle and in the conduit to enter the slotted cores successively, and an electric motor in the circuit to move the vehicle.

10. In an electric railway, a source of irregular or alternating currents, conductors extending'therefrom, a series of coils placed at intervals along said railway and connected in parallel with said conductors, normally-closed magnetic circuits for the coils, a vehicle, a circuit on the vehicle, a coil divided into sections in the circuit, suitable devices to allow the coil to move into and out of inductive relation with the said magnetic circuits succesively, and an electric motor in the circuit to move the vehicle,

11. In an electric railway, a source of irregu lar or alternating currents, cond uctors extend ing therefrom, a series of coils placed at intervals along said railway and connected in parallel with said ccndnctors, normallyclosed magnetic circuits for the coils, a vehicle, a circuit on the vehicle, a coil divided into sections in the circuit, flexible or yielding couplings between the sections, suitable devices to allow the coil to move into and out of inductive relation with the said magnetic circuits successively, and an electric motor in the circuit to move the vehicle.

12. In an electric railway, a source of irregular or alternating currents, conductors extending therefrom, a series of coils placed at-intervals along said railway and connected in parallel with said conductors, slotted iron cores for the coils, iron brushes to maintain normally-closed magnetic circuits,.a vehicle,

a circuit carried by the vehicle, a coil in the circuit, an iron core in the coil to enter the slotted cores successively, and an electric mo- IIO 

